Niobium Carbide hmoov, NbC

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Niobium Carbide hmoov, NbC

multi-phase ceramics yog ib qho ntawm cov ntaub ntawv raw ntawm ntau-theem ceramic. Qhov ntau-theem ceramic cov ntaub ntawv tsim tawm feem ntau yog nyob rau hauv hardness, siab smelting point, zoo tshuaj lom neeg ruaj khov thiab kev coj ua Nws yog siv nyob rau hauv qhov chaw-resistant qhov chaw, txiav cov cuab yeej thiab electrodes


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Niobium carbide
Tshuaj lom neeg kom muaj nuj nqis: Nbcnt: 3500. C
Lub ntsiab lus Boiling: 4300. C
Qhov ceev: 7. 6g / ml ntawm 25 "C (nws)
Daim ntawv: ferrous hlau hmoovApplication nyob rau hauv cov ntaub ntawv sib xyaw (1) ntau-theem ceramics yog ib qho ntawm cov khoom siv theaw ntawm cov khoom siv ntau theem ceramic. Cov khoom lag luam ntau theem ceramicmaterials tsim muaj feem ntauhardnessmelting qhov taw tes, qhov zoo tshaj plaws kev ruaj khov thiab kev coj ua Nws yog siv nyob rau hauv qhov chaw coj-tiv taus, txiavtools thiab electrodes (2) Cemented carbide tsis tuaj yeem siv tsis tau tsuas yog ashibitor ntawm cemented carbide grain txoj kev loj hlob, tab sis kuj tuaj yeem ua rau theem thib peb nrog WC thiab Co ua ke nrog lwm cov carbides, uas casignificantly txhim kho lub thermal hardness thiab kub tsis kam ntawm cementedcarbide feem cuam tshuam, kub thiab siab tsis kam. Txij li niobium carbide muaj qhov tsis zoo ntawm kev txhim kho qhov nyuaj ntawm lub alloy thiab txhim kho lub pob txha lov ntawm lub alloy, nws tuaj yeem siv los npaj cemented carbide toolmaterials nrog kev ua tau zoo txiav. 3) Lub zog niobium carbidehard theem ntawm kev caij nplooj zeeg hluav taws xob nkag mus rau hauv tus qauv ntawm surfacinglayer, kom lub vuam txheej muaj qhov zoo dua hnav-lub cev pob txha, thiab cov khaub ncaws hnav tau zoo heev. Cov coj tsis kam alloy ntawm no electrodewelding yog 1.2-1.8 npaug tshaj qhov quenched 45 steel (HRC50) thiab 2.43.6 npaug siab tshaj qhov Fe-cr-cb hnav-resistant alloy. Nyob rau tib lub sijhawm, hnav-tiv taus surfacing txheej tsis tas yuav tsum tau txais qhov ua ntej thaum vuam .and tuaj yeem ua rau sab ntsej muag ua haujlwm. Cov kab nrib pleb me me rau saum npoo tuaj yeem tso qhov kev ntxhov siab ntawm txheej txheej surfacing thiab yuav tsis pom zoo mus rau hauv cov khoom siv hauv paus. d Steel ntxiv qib Ntxiv asmall tus nqi ntawm niobium carbide nyob rau hauv cov txheej txheem steelmaking tuaj yeem ua rau koj muaj kev cuam tshuam los ntawm cov nag lossis daus ntxiv dag zog thiab cov khoom siv lead ua kom muaj zog, yog li txhim kho lub zog txhua yam ntawm cov hlau. (4) Aerospacecomponents yog siv los ua cov ntawv qhia chemical chemical rau kev npaj ntau yam khoom siv

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Niobium carbide
CAS (12069-94-2)
EINECS. 235-117-8
physico-tshuaj cov cuab yeej
Niobium carbide yog ntsuab cubic siv lead ua nrog cov xim hlau thiab nws yog los ntawm sodium chloride cubic crystal system.
Tus txheeb ze ceev 8.47, ntxig qhov qub A = 0.447nm,
Melting taw tes yog 3500 ℃. Microhardness> 23.5 Gpa (> 2400 kg / mm2), tawv dua li corundum. 338000 N / yog elastic modulus, thermal expansion coefficient ntawm 6.65 * 10 ^ (6) / K, lub thermal conductivity ntawm 14 w / (m K), tsim kom muaj cua sov - 140.7 kJ / mol, meej muaj peev xwm tshav kub ntawm 36.8 J / (mol · K), thev tsis kam ntawm 35 mu Ω · cm.
Insoluble hauv kub thiab txias hydrochloric acid, sulfuric acid, nitric acid, soluble hauv kub hydrofluoric acid thiab nitric acid sib xyaw ua kua. Ruaj li ntawm 1000 ~ 1100 ℃ thiab nrawm oxidized rau niobium pentoxide tshaj 1100 ℃. Niobium carbide yog ib qho yooj yim uas yuav muab fused rau hauv titanium carbide, zirconium carbide, tungsten carbide thiab lwm cov tebchaw, thiab ua ke los tsim cov homogeneous khoom sib xyaw kom haum. Melting point: 3500 ℃, ntom ntom: 7.6g / cm (25 ℃) siv
Raws li kev ntxiv ntawm carbide hard alloy, nws yog ib qho khoom siv ntawm ternary thiab quaternary carbide cov khoom siv daws teeb meem, xws li WC-NBC-C ternary system. Kuj tseem tuaj yeem ua cov xim ntoo coj ua qhov muag ua lub ntsej muag.
Polycarbides raws nws, xws li NBC-WC-C ternary systems, tuaj yeem siv cov nozzle cov ntaub ntawv hauv ob sab phlu rau kev siv aerospace
Niobium carbide (NbC) yog lub vias siv lead ua xim ntsuab nrog cov xim hlau thiab nws yog los ntawm sodium chloride cubic crystal system. Nws yog ib hom siab melting point, siab hardness cov khoom, dav siv nyob rau hauv refractory high kub khoom thiab nyuaj alloy additive.
Raws li carbide ntxiv cov tshuaj tiv thaiv, nws yog qhov sib xyaw ntawm cov ternary thiab quaternary carbide cov khoom siv daws teeb meem, xws li WC-NBC-C ternary system. Kuj tseem tuaj yeem ua cov xim cuav tsim lub pov haum.
Niobium carbide muaj cov tshuaj lom neeg zoo thiab lub siab kub. Insoluble hauv kub thiab txias hydrochloric acid, sulfuric acid, nitric acid, soluble hauv kub hydrofluoric acid thiab nitric acid sib xyaw daws; Qhov sib xyaw ua ke tau muab tso rau hauv titanium carbide, zirconium carbide, tungsten carbide thiab lwm cov tebchaw, thiab cov khoom sib xyaw ua ke. Ruaj li ntawm 1000-1100 ℃ thiab sai oxidized rau niobium pentoxide tshaj 1100 ℃. Feem ntau, nws tau ntim rau hauv cov hwj yas los yog ntawv txhuas ntawv nyiaj hnab hauv thawv.

(2) Kev siv khoom: Daim ntawv thov rau cov khoom siv sib xyaw: - duplex ceramic: raws li ib qho ntawm cov khoom siv duplex ceramic khoom, ua los ntawm niobium carbide duplex ceramic cov ntaub ntawv nrog lub siab hardness, siab melting point, zoo tshuaj lom neeg ruaj khov thiab hluav taws xob conductivity, yog feem ntau siv nyob rau hauv qhov chaw coj-resistant, cemented carbide txiav cov cuab yeej thiab thaj chaw electrode: tsis tsuas yog siv tau los ua cemented carbide lis kev loj hlob inhibitor, tab sis kuj nrog lwm cov carbides tsim sab nraum WC thiab Co peb dispersoid, ho txhim kho cov carbide kub hardness thiab thermal poob siab tsis kam mus rau qhov siab oxidation tsis kam muaj peev xwm Niobium carbide nrog txhim kho lub hardness ntawm alloy thiab txhim kho qhov nyuaj ntawm cov alloy, thiab lwm yam, yog li nws tuaj yeem siv rau qhov kev npaj ntawm kev ua tiav ntawm kev ua tiav ntawm cemented carbide txiav cov cuab yeej cov khoom siv thiab niobium carbide tuaj yeem ua rau ntshav dag lub pov haum - surfacing electrode, khoom niobium carbide nyuaj rau hauv lub koom haum txheej hardfacing, ua cov weldin g txheej tau zoo hnav-pob txha pob txha, wearability zoo heev txhim kho lub overlaying vuam electrode hnav-resistant alloy, nws hnav tsis kam tshaj li ntawm quenched 45 # hlau (HRC50) 1.2 1.8 npaug li siab dua, dua li hauv Fe - Cr - C - B khiav -in siab dua li 2.4 txog 3.6 npaug ntawm qhov cuam tshuamWelds tib lub sijhawm, hnav-tiv thaiv txheej txheej vuam txheej yam tsis muaj preheating, muaj nyob rau hauv workpiece nto vuam, saum npoo me me tuaj yeem tso tawm ntawm surfacing vuam txheej kev ntxhov siab thiab tsis kis tau nyob hauv niam txiv hlau thiab steel ntxiv dag zog theem nyob rau hauv cov txheej txheem ntawm steelmaking kab niobium carbide, tuaj yeem ua tiav cov nag lossis daus kom muaj zog thiab zoo lis kev ua kom muaj zog, thiaj li txhim kho cov cuab yeej zoo txhua yam ntawm cov hlau, qhov chaw aerospace: siv rau turbine rotor hniav cav nozzle dav hlau vane txheej thiab nuclear qauv reactor thiab ntau lwm aviation khoom spare qhov chaw npaj cov khoom siv hauv cov ntaub ntawv thov txheej: - tuag steel nto txheej: niobi um carbide raws li hlau carbides, muaj qhov kub siab ua haujlwm siab kub siab thiab kev ua haujlwm tsis zoo yog li nws siv rau hauv cov hlau qhia tias tuaj yeem txhim kho qhov tuag saum npoo hnav tsis kam - hlau ua haujlwm-thooj txheej: hauv cov hlau matrix puas niobium carbide saum npoo ntawm workpiece, ua nws qhov chaw ua haujlwm nyuaj yog qhov nce ntau, tuaj yeem ua tiav HV2800 saum toj no, tib lub sijhawm, txhim kho kev ua haujlwm ntawm qhov chaw ua haujlwm ntom ntom ntom nti thiab lub koom haum, thiaj li ua kom ntev nws cov kev pabcuam lub neej los ntawm cov tshuaj ua kua theem tso txheej txheem tuaj yeem paub txog niobium carbide txheej txheej saum npoo cam khwb cia hlau piston rings, txheej thiab cov khoom siv hauv paus hauv kev sib xyaw nrog lub zog; Cov txheej txheej no piston nplhaib tau zoo cia lub hnab tshos cov qauv, thiab qhov zoo ntawm ob qho siab ua kom siab, tuaj yeem txo tau yam tsis muaj lubrication nruab nrab thiab qhov zawv zawg coefficient thaum lub diesel lub tshuab roj lubrication, zoo heev txhim kho cov hnav tsis kam, tuaj yeem txo qhov kev sib txhuam ntawm cov roj cav hauv lub sijhawm, txhim kho cov roj cav ua tau zoo - lwm cov niobium carbide txheej txheej: chaw ua haujlwm ntawm qhov kub thiab txias uas siv cov tshuaj niobium carbide, tuaj yeem ua rau nws cov kev pab cuam lub neej tau zoo dua hauv kev lag luam hluav taws xob, hluav taws xob tub luam cov khoom nruab nrab siv ultrafine cobalt muaj niobium carbide, txhawm rau txhim kho tus nqi hluav taws xob cov nplaim ntawm daim phiaj Kav qis dua qhov kub thiab txias hauv daim phiaj thiab txo cov kab hluav taws xob thermal emission muaj qhov cuam tshuam loj, yog li yuav ua kom ntev lub neej ntawm cov raj hluav taws xob hauv kev siv hlau niobium ntau lawm: lub ntsiab indirect txo txoj kev siv los tsim hlau niobium, cov khoom tsim tawm ntawm niobium carbide thawj zaug siv los ua lub luag hauj lwm, thiab niobium pentoxide tsim tuab hlau niobium, ua rau ua kom lub siab huv siab hlau niobium ntxiv, niobium carbide kuj tseem tuaj yeem txo kev ncaj ncees los tsim cov ntshiab hlau niobium niobium pentoxide.

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